Before the most recent surgery, his left eye was 20/200, but it is still too early to tell what the improvement, if any, will be.
Other risk factors include increasing age and recent major surgery.
More than two years had passed since his most recent surgery.
Have you had a recent surgery or prolonged bed rest?
The cause was complications of recent surgery, said his wife, Gene.
"I'm sorry about the outcome of the most recent surgery," he said at last.
"Do you remember if the patient had had recent surgery?"
Morris is going to run a scan and see if he had any recent facial surgery.
But recent surgery on scar tissue near the eye has given Williams new hope for recovery.
He had appeared to have been in good health despite recent minor surgery.